Mold-former.



J. C. REED.

MOLD FORMER.

APPLICATION FILED AUG. 29, 1912.

1,078,108. Patented N0v.11,/1913.

INIIENTOR i l Miva.

Attys ITED STATES PATENT ortica.

JOHN C. REED, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO STANDARD SANITARY MANUFACTURING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

MOLD-FORMER.

Specification of Letters Patent.

Application filed August 29, 1912. Serial No. 717,746.

To all whom t may concern:

Be it known that I, JOHN C. REED, residing at Pittsburgh, in the county `of Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Mold-Formers, of which improvement the following is a specification.

My invention relates to the forming of molds for cast metal bath tubs, having a coating of vitreous enamel, and provided with outstanding partition-wings, such as shown and described in my application Serial No. 717,745.

In the manufacture of cast metal bath tubs covered with a coating of vitreous enamel, the metal must be of substantially constant thickness throughout, for if the metal varies in thickness it will heat and cool unevenly in the process of enameling and thereby cause cracks or crazes to appear in the enamel. For this reason it is desirable to form the wings, mentioned above, of substantially constant thickness throughout, such thickness being substans tially the same as that of the tub-body. In the ordinary practice of forming molds, it would be necessary, in order to provide a tub with integral wings of substantially constant thickness, to remove the wing- `forming portion of the pattern from the sand with great care and exactness. Otherwise, the parallel walls of the wing-forming cavity of the mold will be broken down or otherwise rendered defective; and such injury may occur even when very unusual precautions are taken.

The object of my invention is toprovide a mold former, whereby partition wings of substantially even thickness throughout may, in a simple and practical manner be mechanically formed on the outside of bath tubs and integral therewith.

In the accompanying drawing, which forms part of my specification, and ywherein the preferred form of my invention Vis illustrated, Figure 1 is a top plan view of a mold former for the outside walls of a corner tub; Fig. 2 is a vertical sectional view taken on the line II II, Fig. 1; and Fig. 3 is a transverse sectional view taken on the line III III, Fig. 1.

Like numerals are used to designate like parts.

` clamped together.

The mold former shown herein consists of a skeleton frame 1 and a pattern 2, sup-` ported by the-said frame through an interposed jarring ring 3. The said frame has side walls l, end walls, and a peripheral ledge 6 adapted to receive the said ring and provided with lugs 7. The pattern 2, which is preferably made of cast metal, may be eXteriorly of the desired form of the tub body; and, as shown herein, is formed for the outside walls of a corner tub such as illustrated in Figs. l to 4 of my application, Serial No. 717,745. A supporting rib 8 is formed on the bottom portion of the tub body or pattern 2, and a rim 9 on the top of the tub body, one side and one end of which rim is curved, while the opposite side and end of the rim has a horizontally disposed ledge 10 adapted to lit against or eX- tend into corner-forming walls of a bath room.

In forming a mold from such a pattern, as thus far described, the usual practice is to place a suitable fiask (not shown herein) around the pattern 2, such flask resting upon the top face 11 of the frame 1 and being brought to proper relative position upon said frame by means of pins (not shown) which extend through holes 12 in the lugs 7 The two said members are then suitably Sand is then placed in the flask, and suitably packed between the inner wall of such iiask and the pattern 2. After the mold is thus formed, the connection between the flask and frame 1 is released, the ring 3 is suitably jarred to loosen the sand from the surface of the pattern, and the'iask containing the mold is lifted vertically by a suitable crane.` All of the foregoing procedure is a matter of common practice and-need not be illustrated or further described. It will be observed, however, that the side walls of thev tubl pattern 2 slope from the top port-ion or rims 9 and vl0 to the bottom or supporting rib 8; and that on account of such sloping sides it is not necessary for the workmen to remove the mold containing the flask in an absolutely vertical direction.

In order to form pockets in the mold, so that partition wings may be cast integrally with the tub body, such partition wings beingV of substantially constant thickness throughout so that they may be readily ratenteanev. 11, 1913.

movable through the said slot 14, and so l shaped thatwhen in outward position it Vforms the desired wing pocket in the mold.

' The mold former shown herein is arrangedl to provide two of such pockets in the mold.-

For each movable plate 13 a vertically disposed slot 14 is formedin the body of the tub pattern, and each plate is slidably mounted in suit-able inclined tracks 15 and 16,secured tothe patternQ and the ring 3, respectively. Each slot 14 preferably eX- tends to a point adjacent tofthe outer edge ofthe ri-m of the tub, leaving a portion4 17 of the rim connected for purposes of rigidity in the pattern. A plate-like projection 18 (see sectionally in Figs. 2' and 3) is formed onthe said connecting portion 17, such projection being provided to fill in the space between the lower side of each plate 13.(when in outward position) and the adjacent side of the rim.

In order to move each plate 13 from one to another of its alternate positions, I pref- Vv erably provide shafts 19, rotatably mounted in the frame 1; and to each shaft I secure' a'iinger 20 having link connection to a plate 13. The said shafts may be turned'by a suitable crank or handle (not shown) atller.

tachable `,to their outer ends. Y

In the operation of my mold former the mold ask is placed in position around the pattern 2 in the usual and well known man- The plates 13 are then moved toV their outward positions (as is shown in the drawing) and the sand is packed about the pattern 2 and said extendingl plates. After the sand has been thoroughly packedin the usual manner the plates 'are withdrawn from the mold formed about them to their position within the tub pattern. It will be'understood that in their withdrawn positionthe plates are (as indicated in dotted i lines vin Figz) completely within the vpattern V2. `While theA said plates are being withdrawn each moves in its own plane, such movement being determined by the tracks or guides 15 and 1G; and the integrity Vof the mold adjacent to the wing pocket is maintained, the pattern 2 adjacent to each plate forming an eifectual pro- Gopies of this patentmay be obtained for tails o f construction shown herein for obviously many changes may be made by those skilled in the art without departing from the spirit of my invention.

I claim herein as my invention:

A 1. In a mold former for bath tubs having integral outstanding partition wings, the combination of a tub body-pattern having a slot in the side thereof extending from the bottom to the rim, a plate movable through saidl slot and when in outward position forming a partition wing moldingmember, and a plate-like projection extending outwardly from-the rim portion of the tub pattern adjacent to said slot, said projection being adapted to form a portion of a partition wing mold pocket.

2. Ina mold former for bath tubs having outstanding partition wings, the combination with a pattern-supporting frame, of a tub body pattern having a slot in its side extending from the bottom to the rim, a plate movable through said slot, and a pair of guideways for said plate one secured to said frame and one to said body pattern,

said plate forming when in outward position a partition wing molding member.

3. In a mold former for bath tubs having integral outstanding partition wings, the combination of a tub body pattern provided with a slot in its side extending from `the bottom to a point adjacent to the outer edge of the rim of such pattern, the uncut portion of said rim adjacent to said slot rigidly uniting the portion of said pattern adjacent thereto, a member movable through said slot and when in outward position formin a partition-wing molding-member extending fromV the plane of the bottom of the body pattern to a point beneath the rim thereof,

i anda supplemental molding-member adapted to form the wing pocket from the end of said movable member to the adjacent side of said rim when said movable member is in outward position.

In testimony whereof I have hereunto set my hand.

J OI-IN C. REED. Witnesses PAUL N.l CRITCHLOW, FRANCIS J. ToMAssoN.

ive cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

